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Because symptoms generally come on gradually over weeks or months, you may have hyperthyroidism for a long time before you realize it. If you are an older adult, it may be even harder to recognize that something is wrong, because your only symptoms may be weight loss and/or
depression
.

There are many symptoms of hyperthyroidism. They are listed below, in general, from most frequent to less frequent.

Restlessness, nervousness, and irritability

Fatigue and weakness may follow the restlessness and nervousness

Heat intolerance—You may feel warmer than the people around you

Heart palpitations, irregular heartbeat, skipped beats

Tachycardia—a rapid heartbeat and pulse

Unexplained weight loss—An increased metabolism means your body is burning calories more rapidly, thus you may lose weight even though you are eating more. However, 5%-10% of people with hyperthyroidism gain weight because they are eating more.

Warm, moist skin

Increased bowel movements—Food travels more quickly through the gastrointestinal tract.

Insomnia—You may have trouble sleeping in spite of the fact that you feel tired all the time.

Tremor—If you stretch out your fingers, you may have a fine tremor.

Menstrual irregularity

Loss of libido

Fine hair texture—Up to 40% of patients experience some baldness. This can last for months after the thyroid hormone level has been restored to normal

Revision Information

This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.